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Unformatted text preview: ME 410 Spring 2008 Homework 10 Due: March 20, 2008 1. Consider a rectangular fin that is used to cool a motorcycle engine. The fin is 0.15 m long and at a temperature of 250C, while the motorcycle is moving at 80 km/h in air at 27C. The air may be assumed to be flowing along both surfaces of the fin. a. Determine the rate of heat removal per unit width of the fin. b. Generate a plot of heat removal rate per unit width of the fin for motorcycle speeds of 10-150 km/h. Properties of air are needed, Film temperature 412 K, =27.85e-6 m 2 /s, k = 0.0346 W/mK, Pr=0.69 Mathematical Model, need to determine heat flow/width away from the fin ) ( 2 = T T hL q s Determine h, an average convection coefficient, by classifying the problem Forced Convection--external flow--flat plateparallel flow I-A-1-I, several correlations fit this classification. Need to determine boundary condition and specify fluid mechanics. Plate is said to be at 250C, assume isothermal as a first approximation. isothermal as a first approximation....
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This note was uploaded on 07/25/2008 for the course ME 410 taught by Professor Benard during the Spring '08 term at Michigan State University.
- Spring '08
- Heat Transfer